Demountable form for poured concrete



July 4, 1944. R. L. GEER DEMOUNTABLE FORM FOR POURED CONCRETE Filed Feb.10, 1941 s Sheets-She et 1 FIVE-Prop Qzsaell 1,. Gear Y mow-29's v July4, 1944'. R. L. GEER 2,352,783

DEMOUNTABLE FORM FOR POURED CONCRETE Filed Feb. 10, 1941 3 Sheets-Sheet2 m '7 Quasefl A. Gee) OaTTOmEyJ R. L. GEER DEMOUNTABLE FORM FOR POUREDCONCRETE July 4, 1944. 2,352,783

Filed Feb. 10, 1941 26 re @6 i H J/H g5 20 3 Sheets-Sheet 3 madQg/Lszse// 1.. Gee)" Qllrrowys MM. QfA V v J.

Patented July 4, 1944 DEMOUNTABLE FoRMroaPoURnn CONCRETE Russell L.Geer, Grand Island, Nebr.

Application February 1941, Serial No. 3.78,169.

7 Claims. (01. zt si The present invention relates to demountable. formsfor poured concrete, and has particularlyto do with the problemofprovidingformsof such character for use in making walls of angular orcorner configuration. H l

One general object ofthe invention is to provide a novel andsimplifiedsystem of elements which can be easily erected, or taken down, informing a poured concrete wall .of angular con-- figuration.

More specifically, it is an object of the invention to provide animproved, demountable corner form' arrangement such that a minimumamount of change in the same is requiredin setting up forms for walls ofa wide variety of thickness.

Anotherobject is to provide an improved form.

of structure such-that it can beused in forming the merging cornerbetween either twoor'three wall forms, as the requirements ofaparticular. structure may dictate. j

"The invention also resides in various improvements and innovations inthe corner form :arrangement disclosed, by-virtue of which ease oferection anddismantling; simplicity of manipulaticn, and wideflexibility of use, are all combined in an extremely simple and ruggedstructure of low cost. 7

Further objects and advantages of the invention will becomeapparent asthe following description proceeds, taken in connection withtheaccompanying drawings in which:

Figure 1 is a fragmentary perspective view of a form embodyingtheinvention.

Fig. 2' is a detail perspective view of a crosstie clamp included in thearrangement of Fig. 1.

Fig. 3 shown in Fig. 1.

Figs. 4 and 5 are detail perspective views of, respectively, a cross-tiebar and key included in the apparatus of Fig. 1.

Figs. 6 and 6 are diagrammaticplan views showing, respectively, thestructurally separate form parts and assembled form parts for a formconstructed in accordance with the present invention. v v

Figs. '7 and '7 are diagrammatic views correspending to Figs. 6 and 6but showing the elements used in a form'for a'wall ness than that ofFig. 6.

Figs. 8 and 8 are diagrammaticjviews also corresponding toFi'gs. '6and 6showing the-form elements arranged for a T-shaped corner juncture.

While the invention is susceptible of various modifications andalternative constructions, I haveshown in the drawings and willherein'describe in detail the preferred embodiment, but it is to beunderstood that I' do not thereby intend togiimit the invention to thespecific form disclosed, but intend to cover all modifications i anenlarged plan View of the'form of lesser thick the inner edges of thesewooden plates.

and alternative constructions falling within the spirit and scope of theinvention as expressed in the appended claims.

In the exemplary construction (see Figs. 1 and 3) I have shown' theinvention as embodied in a demountable formassembly for a poured concrete wall, comprising, inbrief, a corner form A- ticularly' describedand claimed in my copending application S. N.-345,296, filed July 13,1940.

Herein Lhaveclescribedonly so much of the wall.

form arrangement as coacts directly with the elementsof the corner.form.A.

The corner form A comprises innerandouter form elements, designatedgenerallyas J2. and i3. respectively, which define between.them ;a wallcavity of right .angular or. .L.-shape. .to receive the poured concrete.l .The forms. I.2.and 13 include. mold wallsfl-of.angularuconfiguration.

which constitute, in effect, continuations of,., or

merge with, the mold [walls J0. and. H of the.

wall forms B and buttfrom which they are structurally separable--.

Turning now to the details of the. outer corner form [3, it includes.two right angularly .disposed mold wall or mold boardv sections made.up. of an outer layer of rough lumber i4 coveredby an inner facing l5 ofsmooth sheet material such as plywood. A cove I6 .(Fig. 3) presenting anarcuate inner face extends along the juncture between these two moldwall sections--.

On the exterior of the; mold .wall sections for the outer corner form 13is a reenforcing arrangement including a vertically extending angle ironH which embracesthe corner juncture :of the mold wall sections as wellas the cove I6 and rigidly reenforces the same, being bolted .to themold wall sections. Welded to the angle iron .11 at spacedpointsalongsthe latterslengthare a plurality ofvertically spacedL-shaped metal reenforcing members. l8v (only one of whichis hereshown). These members 18 are fashioned from flat metal stockand extendgenerally horizontally along respective mold wall sections in .re-.

enforcing relationship. thereto. .Wooden plates or timbers l9 arescrewed to the loweiafacenfv each of the L-shapedireenforcements I8 andthe.

mold walls may be nailed orotherwise securedito Inlthis manner anextremely rigid and durableouter corner form i provided.

The inner corner form i2 includes as one of its principal elements anupright corner post herein shown as being a relatively heavy timber -'20of members, strips of hardwood 23.may be secured to the edges of thewall form mold boards and strips 24 to the edges of the mold walls onthe outer corner form l3 (Fig. 3). These hardwood strips and the edgesof the mold boards 2| are fashioned to form tongue and groove joints asindicated. This not only affords a tight joint but also assures properalinement of the mating portions of the mold walls.

Provision is made iorremovably securing both the outer and inner cornerforms 13 and I2, respectively, to vertical reenforcing studs 25 and 2Bof. the wall forms B and C. It will be observed in Figs. 1 and 3 thatthe studs 25 are fixed to the outer side of the outer mold walls of thewall forms and are disposedadjacent the ends thereof. Similarly, thestuds 26 extend in reeni'orcing relation along the outside of the innermold walls of the wall forms adjacent the ends of the latter. To securetheouter corner form iii to the studs 25, bolts 21 are passed throughregistering holes in the studs 25 and through complementally locatedvertical reenforcing studs 28 fixed to the exterior of the outer cornereach of the brackets. Furthermore, slots 39 are formed in each of thebrackets adjacent the guiding lugs 38. In each of the tie rods 31 acorresponding slot 40 is formed adjacent one end of the rod and a seriesofsuch slots 4| at spaced pointsadjacent the'other endfi'Keys I! (seeFigs. 3 and 5) are inserted through registering ones of the slots in thebrackets and tie rods to hold them aaginst displacement with respect toeach other. In the assembly of these brackets in the illustratedstructure, engagement form, The studs 28 are held in place by boltsv 29passing through apertured, angular flanges'3il on the ends of the.L-shaped members l8.

1 The studs 26 on the inner sides of the wall forms are similarlysecured by through fasteners to an adjacent vertical reenforcement ofthe inner corner form l2. In the illustrative construction bolts 3| aredisposed substantially at right angles to each other (Fig. 3) and passthrough the corner post 20, projecting from the respective outer facesof thelatter. These through bolts 3| are each threaded in a pair of nuts32 welded together and countersunk in the respective innerfaces of thecorner post. It will be noted that the mold boards 2| cover thesecountersunk nuts.

The drawing together of the complementally located uprights of thecorner and wall forms, by the through bolts Zland 3|, may also serve tocause these uprights to grip and hold in position clamps or brackets 33which are included in .the .cross tying arrangement for the wall forms.In the present instance the clamps 33 have been shown as being of anovel form described and claimed in my copending application S.- N.345,296 referred to above. Upon reference to Fig. 2 it will be seen thateach of the brackets 33 is fashioned as a unitary structure from asingle metal plate having a body portion 34 whichis generally square inoutline. From two adjacent edges of this body 34 integral ears 35 and 36are bent to overlie in spaced relation the opposite faces of the body34. The cars 35, 36 thus define with the body apair of right angularlyrelated channels on opposite sides of the body 34 and to receive one ofthe wall form studs 25 or 26, to which it is applied,

Tapering tie rods 31 (see Figs. 3 and 4) are arranged to traverse thewall form and are suitably secured to opposed pairs of brackets 33. Forthis purpose, the end portions of the tie rods are received between andguided by opposed pairs of lugs 38 struck out from the ear portions ofin Fig. 6

of a bracket channel with any stud 25, 26 will, 'as shown in Fig. 3,dispose an ear thereof between that stud and the complemental member 20or 28. When the associate through bolts 21 or 3| are tightened, thebrackets will be secured in place. i v

The versatility of the sectionalized system of forms described can bestbe appreciated upon reference to Figs. 6 to 8*. The transverse tieshave, been omitted from these figures for clarity. In Fig. 6, I haveshown diagrammatically the parts of a corner form A and wall forms B andC priorto their assembly in the configuration indicated It should benoted that the ends of the inner and outer corner forms aresubstantially alined with each other in a direction transverse of thewall cavity which they define between them. This being the case theyare, when assembled, properly alined with respect to the complementalends of the wall forms which are in similar alinement with each other.It is obviously a simple matterv to bolt the corner form elements l2 andI3 to the wall forms tov effect a strong rigid structure, and equallysimple to unbolt them and disassemble the form for use at another pointand without injuring the form parts.

In order to set up a formfor a wall of somewhat lesser thickness, suchas that indicated in Fig. 7 and still maintain the transverse alinementof the ends of the wall forms, it is necessary merely to use a set ofform elements like that indicated in Fig. '7 whichis identical withthose of Fig. 6, except that the inner corner form I2.

Figs. 8 and 8 In this instance the form elements areused to define agenerally T--shapecl v wall cavity such as is used at the juncture ofthree wall forms B, C and D. In this'case two inner corner forms [2 areutilized together with'a filler wall 43, which may be simply a plainsection joining the adjacent and-alinedouter mold walls for two of thewall forms.

From the foregoing it will be appreciated that I have provided a wallform arrangement of extreme simplicity. Its heavyreenforcement'injsuresgreat ruggedness and strength, though its general simplicity makesit.low in cost as well as simple for even the unskilled to use. Because"of the variety of shapes and'sizes of walls which can be easily andeconomically assembled and disassembled on many successive work sitesbecause the versatility or flexibility of shapes in which the parts canbe erected makes it suitable for the variations that may be encounteredin each new job.

I claim as my invention:

1. A form for poured concrete comprising, in combination, a pair ofdemountable Wall forms disposed at an angle to each other, each of saidwall forms comprising a pair of opposed mold Walls defining a wallcavity therebetween for poured concrete, said mold walls having verticalreenforcing members fixed to their outer sides adjacent their respectiveends, cross-ties joining the opposed mold walls of said wall forms,means including brackets having portions lying on the end edges of saidreenforcing members for removably securing said cross-ties in place,inner and outer corner forms including mold walls of matchingconfiguration disposed to joinrespectively the inner and outer walls ofsaid wall forms, the outer ends of said corner form mold walls beingsubstantially in alinement with each other in a direction transverse ofthe respective arms of the cavity defined therebetween, each of said Lcorner forms having. vertical reenforcing members fixed to the outerfaces of their respective mold walls and extending adjacent the outerends thereof, and means for removably securing said vertical reenforcingmembers on said corner forms to the adjacent reenforcing members on saidwall forms and drawing them toward the latter to clamp said portions ofsaid brackets between the adjacent reenforcing members on the wall andcorner forms.

2. A form for poured concrete comprising, in combination, a pair ofdemountable wall forms disposed at an angle to each other, each of saidwall forms comprising a pair of opposed mold walls defining a wallcavity therebetween forpoured concrete, said mold walls having verticalreenforcing members fixed to their outer sides adjacent their respectiveends, inner and outer corner forms including mold walls of matchingconfiguration disposed to join respectively the inner and outer walls ofsaid wall forms, said mold walls of the corner form being disposed inabutting edge-to-edge relation with said mold walls of the wall formsand having tongue and groove connections therewith along the abuttingedges thereof, the outer ends of said corner form mold walls beingsubstantially in alinement with each other in a direction transverse ofthe respective arms of the cavity defined therebetween, each of saidcorner forms having vertical reenforcing members fixed to the outerfaces of their respective mold walls and extending adjacent the outerends thereof, and through fasteners for drawing said verticalreenforcing members on said corner forms against the adjacentreenforcing members on said wall forms and at the same time seating thecoacting elements of said tongue and groove connections.

3. In a demountable corner form for a poured concrete wall, thecombination of a mold wa l presenting two angularly disposed sectionshaving a vertical line of juncture, a vertically extending angle ironfixed to the outer side of said mold wall and extending along the lineof juncture between said angularly disposed sections, and a plurality ofgenerally L-shaped reenforcing members rigidly fixed to said angle ironat spaced points along the latter's length, said reenforcing membersbeing disposed substantially in horizontal planes with their armsembracing the mold wall sections extending in reenforcing relation alongthe outer surfaces of said mold wall sections.

4. In a demountable corner form for a poured concrete wall, thecombination of a mold, wall presenting two angularly disposed sectionshaving a vertical line of juncture, a vertically extending angle ironfixed to the outer side of said mold wall and extending along the lineof juncture between said angularly disposed sections, a plurality ofgenerally L-shaped metal reenforcing members rigidly fixed to said angleiron at spaced points along the latters length, said reenforcing membersbeing disposed generally horizontally with their arms embracing the moldwall sections and extending in reeenforcing relation along the outerfaces of said mold wall sections, and wooden plates extending along thearms of said L shaped reenforcing members and fixed thereto as well asto said mold walls.

5. In a demountable corner form for a poured concrete wall, thecombination of a mold wall presenting two angularly disposed sectionshaving a vertical line of juncture, a vertically extending angle ironfixed to the outer side of said mold wall and extending along the lineof juncture between said angularly disposed sections, and a plurality ofgenerally Lshaped metal reenforcing members rigidly fixed to said angleiron at spaced points along the latters length, said reenforcing membersbeing disposed substantially horizontally with their arms extending inreenforcing relation along the outer surfaces of said mold wallsections, and said L- shaped members having integral means on the outerends thereof for attachment of the same to adjacent wall forms.

6. In a form for poured concrete, the combination with a demountablewall form adapted to define one side of a wall cavity near a cornerthereof, vertical reenforcing means fixed on the outer side of said wallform adjacent the end thereof nearest the corner, a cross tie supportingbracket having a portion lying on the end edge of said reenforcingmeans, a corner form mold wall disposed to join said wall form, verticalreenforcing means fixed to the outer face of said corner form mold walland having a surface for abutment with the reenforcing means on saidwall form, and means for drawing and securing the reenforcing means onthe corner form mold wall and on the wall form together with saidportion of said cross 'tie bracket lying between adjacent surfaces ofsaid reenforcing means.

'7. In a form for poured concrete, the combination with a demountablewall form adapted to define one side of a wall cavity near a cornerthereof, vertical reenforcing means fixed on the outer side of said wallform adjacent the end thereof nearest the corner, a corner form moldwallv arranged for edgewise abutment with said wall form, the meetingedges of said wall form and said corner form mold wall having acomplemental tongue and groove connection, reenforcing means fixed tothe outer face of said corner form mold Wall and presenting a surfaceopposed to a surface on the reenforcing means on said wall form, andthrough fasteners providing connections between said reenforcing meansoperable to draw them securely together and at the same time seat thecomplemental elements of said tongue and groove connections.

RUSSELL L. GEER.

